223456788 has 18 divisors (see below), whose sum is σ = 564849194. Its totient is φ = 74485584.

The previous prime is 223456781. The next prime is 223456811. The reversal of 223456788 is 887654322.

223456788 is a `hidden beast` number, since 2 + 2 + 3 + 4 + 567 + 88 = 666.

It can be written as a sum of positive squares in only one way, i.e., 173923344 + 49533444 = 13188^2 + 7038^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×223456788² = 99865872206553888, which contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223456781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3103531 + ... + 3103602.

Almost surely, 2^223456788 is an apocalyptic number.

It is an amenable number.

223456788 is an abundant number, since it is smaller than the sum of its proper divisors (341392406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

223456788 is a wasteful number, since it uses less digits than its factorization.

223456788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6207143 (or 6207138 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 223456788 is about 14948.4710923893. The cubic root of 223456788 is about 606.8264709369.

The spelling of 223456788 in words is "two hundred twenty-three million, four hundred fifty-six thousand, seven hundred eighty-eight".